Display sign



FIG. 1 is a front view of a display sign of the present design;

FIG. 2 is a side (edge) view of the display sign of FIG. 1; and,

FIG. 3 is a back view of the display sign of FIG. 1.

The broken lines in the drawings represent environmental structure only and form no part of the claimed design. 

The ornamental design for a display sign, as shown and described. 